import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

public class TcpEchoClient {
    private Socket socket = null;

    public TcpEchoClient(String serverIp, int serverPort) throws IOException {
        socket = new Socket(serverIp, serverPort);
    }

    public void start()
    {
        Scanner scanner = new Scanner(System.in);
        try (InputStream inputStream = socket.getInputStream())
        {
            OutputStream outputStream = socket.getOutputStream();
            PrintWriter writer = new PrintWriter(outputStream);
            Scanner scannerNetwork = new Scanner(inputStream);
            while (true)
            {
                //1. 从控制台读取用户输入内容
                System.out.print("-> ");
                String request = scanner.next();

                //2. 把字符串作为请求, 发送给服务器
                writer.println(request);
                writer.flush();

                //3. 读取服务器返回的响应
                String response = scannerNetwork.next();
                //4. 在界面上显示
                System.out.println(response);
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static void main(String[] args) throws IOException {
        TcpEchoClient client = new TcpEchoClient("127.0.0.1", 9090);
        client.start();
    }
}
